fs/jffs2/xattr_user.c

   1 /*
   2  * JFFS2 -- Journalling Flash File System, Version 2.
   3  *
   4  * Copyright © 2006  NEC Corporation
   5  *
   6  * Created by KaiGai Kohei <kaigai@ak.jp.nec.com>
   7  *
   8  * For licensing information, see the file 'LICENCE' in this directory.
   9  *
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/fs.h>
  14 #include <linux/jffs2.h>
  15 #include <linux/xattr.h>
  16 #include <linux/mtd/mtd.h>
  17 #include "nodelist.h"
  18
  19 static int jffs2_user_getxattr(struct dentry *dentry, const char *name,
  20                                void *buffer, size_t size, int type)
  21 {
  22         if (!strcmp(name, ""))
  23                 return -EINVAL;
  24         return do_jffs2_getxattr(dentry->d_inode, JFFS2_XPREFIX_USER,
  25                                  name, buffer, size);
  26 }
  27
  28 static int jffs2_user_setxattr(struct dentry *dentry, const char *name,
  29                 const void *buffer, size_t size, int flags, int type)
  30 {
  31         if (!strcmp(name, ""))
  32                 return -EINVAL;
  33         return do_jffs2_setxattr(dentry->d_inode, JFFS2_XPREFIX_USER,
  34                                  name, buffer, size, flags);
  35 }
  36
  37 static size_t jffs2_user_listxattr(struct dentry *dentry, char *list,
  38                 size_t list_size, const char *name, size_t name_len, int type)
  39 {
  40         size_t retlen = XATTR_USER_PREFIX_LEN + name_len + 1;
  41
  42         if (list && retlen <= list_size) {
  43                 strcpy(list, XATTR_USER_PREFIX);
  44                 strcpy(list + XATTR_USER_PREFIX_LEN, name);
  45         }
  46
  47         return retlen;
  48 }
  49
  50 struct xattr_handler jffs2_user_xattr_handler = {
  51         .prefix = XATTR_USER_PREFIX,
  52         .list = jffs2_user_listxattr,
  53         .set = jffs2_user_setxattr,
  54         .get = jffs2_user_getxattr
  55 };